Improvement in combination squares



D.- A. B. BAILEY.

Combination Square.

Patented June 11, 1867.

No. 65,631. x

J IIHIHIIHHMII MPETERS. PNDHLLITHOGRAMER WA Quinn gram gamut @ffim.

D. A. B. B-AlLEY, OF ST. JOHNSBURY, VE'RMONT.

Lettcm Patent No. 65,631, dated June 11,1867.

IMPROVEMENT IN COMBINATION SQUARES.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, D. A. B. BAILEY, of St. Johnshury, in the county ofCaledonia, and State of Vermont, have invented a new and usefulImprovement in Combination Square; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings forming part of thisspecification.

My invention consistsin attaching to the ordinary steel square atriangular-shaped frame, made toslide upon the square, and to which isattached by a hinge at one end an adjustable face for the square in sucha manner that it is made to rest upon the squareat any desired angle;and also in the combination of parts, whereby they are made to servemany useful purposes, as will be hereinafter described.

Figure 1 represents a side view of the square and parts attached.

Figure 2 is a'section through the line :0 z, fig. 1.

Figure 3 is a section through the line y y of fig.

Figure 4 is a view of the back side, with a portion of the sliding-framecut away to show the square.

Similar letters of reference indicatelike parts.

A represents thesquare. B is the sliding-frame, triangular in shape,with two of the sides ofthe triangle cut away on the top at a; the lowerportion is seen in dotted lines. In the shoulders of the part cut awaythere are slots, as seen at b 6, through which the square passes. C is aset-screw, which holds the frame in any desired position on the square.The partB of the triangle stands always at a right angle with thesquare. l) is the face which is hinged to the frame or top of B at d. Eis a sliding-circle, attached to D. The centre of the circle is thejoint0?. f is a set-screw, attached to B, whose hcad bears upon the circleand holds it in any desired position. As the face D stands, as seen inthe drawing, it forms a trying-square, or stands at right angles with A.When it is thrown out, as seen in red lines, it forms, with the square,21. bevel, which may be adjusted to any desired angle, and held by theset-screwf. g g are points, one of which is attachedto.v

the face D, and the other to the angle of the frame B. They turn onset-screws h h, and fold up when not in use, as seenat h. Thesepoints-form compasses. Theset-screwshold them fastwhen they are used,and also when they are folded. The face-piece D has a long slot throughwhich the square passes. This slot is seen in. fig. 3 at J, with'thesquare in the upper portion. This long slot is necessary to allow theface to be adjusted to any desired angle on the square. The various usesto which this combination is adapted will readily suggestthemselves tomechanics.

' Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The frame B B, the face pieces'D, the circle and the points gg, thewhole constructed, arranged, and held in position substantially asherein shown and described, in combination with the square for thepurposes set forth. I

D. A. B. BAILEY.

Witnesses:

W. N. RANDALL, SIAS RANDALL, 2d.

